{"id":"CVE-2026-116165","kind":"vulnerability","aliases":["CVE-2026-116165"],"related":[],"title":"Parse Server: unauthenticated clients can delete class schemas on MongoDB","description":"Parse Server before 8.6.101 and 9.0.0 before 9.10.4-alpha.4 contains a missing authorization vulnerability on MongoDB deployments that lets clients without the master key delete the stored schema of any class. Unauthenticated attackers can send REST API delete requests targeting the internal _SCHEMA collection to remove field definitions, class-level permissions, and protected fields, exposing data to unauthorized reads and modifications.","summary":"Parse Server deployments on MongoDB let clients without the master key send REST delete requests against the internal _SCHEMA collection. An attacker can remove field definitions, class-level permissions and protected fields, exposing data to unauthorized reads and changes.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["mongodb","node","package","parse-server","self-hosted"],"not_affected_if":["auth-required","non-mongodb-database"],"how_to_check":"- Check the installed parse package version with `npm ls parse-server` and confirm whether it is below `8.6.101` or in the `9.0.0` to `9.10.4-alpha.3` range.\n- Confirm the database is MongoDB, since the flaw is described only for MongoDB deployments.\n- Check whether the server is reachable from the internet and whether the master key is configured.","fix":"- Upgrade parse-server to `8.6.101` or later on the 8.x line.\n- Upgrade parse-server to `9.10.4-alpha.4` or later on the 9.x line.\n- Until patched, restrict network access to the Parse Server REST API.","status":"open","published_at":"2026-10-25T14:16:55+00:00","first_seen_at":"2026-10-25T14:41:23+00:00","triaged_at":"2026-10-25T14:42:13+00:00","updated_at":"2026-10-25T14:42:13+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-10-25T14:42:13Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade parse-server to `8.6.101` or later on the 8.x line.\n- Upgrade parse-server to `9.10.4-alpha.4` or later on the 9.x line.\n- Until patched, restrict network access to the Parse Server REST API.","reach":"internet","title":"Parse Server: unauthenticated clients can delete class schemas on MongoDB","impact":"high","summary":"Parse Server deployments on MongoDB let clients without the master key send REST delete requests against the internal _SCHEMA collection. An attacker can remove field definitions, class-level permissions and protected fields, exposing data to unauthorized reads and changes.","category":"package","nicknames":[],"who_cares":["parse-server","node","mongodb","self-hosted"],"confidence":0.7,"needs_auth":"no","worst_case":"Unauthenticated attackers strip class permissions and read or alter protected data.","analyst_note":"Sources do not state whether the flaw affects non-MongoDB backends or what default configuration is vulnerable; check the NVD entry and the Parse Server release notes for 8.6.101 and 9.10.4-alpha.4.","how_to_check":"- Check the installed parse package version with `npm ls parse-server` and confirm whether it is below `8.6.101` or in the `9.0.0` to `9.10.4-alpha.3` range.\n- Confirm the database is MongoDB, since the flaw is described only for MongoDB deployments.\n- Check whether the server is reachable from the internet and whether the master key is configured.","needs_analyst":true,"not_affected_if":["non-mongodb-database","auth-required"],"who_is_affected":"Applications that run Parse Server on MongoDB and expose its REST API to clients without the master key are exposed. Deployments on other databases, or servers reachable only from trusted internal systems, are less exposed; the sources do not say whether other databases are affected.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000683,"input_tokens":3378,"output_tokens":690,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-116165':13A,16A '-2026':12A,15A '8.6.101':69C '9.0.0':71C '9.10.4':73C 'alpha.4':74C 'api':102C 'attack':47B,98C 'author':78C 'chang':65B 'class':7A,53B,96C,115C 'class-level':52B,114C 'client':4A,32B,85C 'collect':45B,109C 'contain':75C 'cve':11A,14A 'data':60B,122C 'definit':51B,113C 'delet':6A,39B,90C,103C 'deploy':28B,82C 'expos':59B,121C 'field':50B,58B,112C,120C 'host':25B 'intern':43B,107C 'key':36B,89C 'let':31B,84C 'level':54B,116C 'master':35B,88C 'miss':77C 'modif':127C 'mongodb':10A,17B,30B,81C 'node':18B 'packag':19B 'pars':1A,21B,26B,66C 'parse-serv':20B 'permiss':55B,117C 'protect':57B,119C 'read':63B,125C 'remov':49B,111C 'request':40B,104C 'rest':38B,101C 'schema':8A,44B,93C,108C 'self':24B 'self-host':23B 'send':37B,100C 'server':2A,22B,27B,67C 'store':92C 'target':105C 'unauthent':3A,97C 'unauthor':62B,124C 'vulner':79C 'without':33B,86C","nicknames":[],"mitigations":[],"who_affected":"Applications that run Parse Server on MongoDB and expose its REST API to clients without the master key are exposed. Deployments on other databases, or servers reachable only from trusted internal systems, are less exposed; the sources do not say whether other databases are affected.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-25T14:16:55+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-116165","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116165","severity":null,"published_at":"2026-10-25T14:16:55+00:00","modified_at":"2026-10-25T14:16:55+00:00","first_seen_at":"2026-10-25T14:41:23+00:00","fetched_at":"2026-10-25T14:41:23+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}